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You searched for: subject:"ecology"
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[audio]07.12.2007 lisovskiy na radio svobodniy golos - yuriy shevchuk
07.12.2007
Keywords: ecology
Downloads: 24
[texts]lin xue gai lun (Volume 4) - zhang hua ling wu bao qun (yi)

Keywords: ecology
Downloads: 190
[texts]Mechanism of β-Aminobutyric Acid-Induced Resistance in Wheat to the Grain Aphid, Sitobion avenae - He-He Cao
The non-protein amino acid β-aminobutyric acid (BABA) could induce plant resistance to a broad spectrum of biotic and abiotic stresses. However, BABA-induced plant resistance to insects is less well-studied, especially its underlying mechanism. In this research, we applied BABA to wheat seedlings and tested its effects on Sitobion avenae. When applied as a soil drench, BABA significantly reduced weight of S...
Keywords: Ecology
Downloads: 5
[texts]A novel inference of the fundamental biodiversity number for multiple immigration-limited communities - Champak Beeravolu Reddy
Neutral community theory postulates a fundamental quantity, θ, which reflects the species diversity on a regional scale. While the recent genealogical formulation of community dynamics has considerably enhanced quantitative neutral ecology, its inferential aspects have remained computationally prohibitive. Here, we make use of a generalized version of the original two-level hierarchical framework in order to define a novel estimator for θ, which proves to be computationally efficient and robus...
Keywords: Ecology
Downloads: 15
[texts]The architectural stratification and woody species diversity in subtropical evergreen broadleaf forests along a latitudinal thermal gradient of the Ryukyu Archipelago, Japan - Sm Feroz
In order to compare stand structure and woody species diversity of subtropical evergreen broadleaf forests along a latitudinal thermal gradient of the Ryukyu Archipelago, tree censuses in a 750 m2 plot in Okinawa Island and a 400 m2 plot in Ishigaki Island were performed. The number of layers increased along a latitudinal thermal gradient from four in the forest of Okinawa Island to five in the forest of Ishigaki Island...
Keywords: Ecology
Downloads: 7
[texts]Beyond species: why ecological interaction networks vary through space and time - Timothée Poisot
Community ecology is tasked with the considerable challenge of predicting the structure, and properties, of emerging ecosystems. It requires the ability to understand how and why species interact, as this will allow the development of mechanism-based predictive models, and as such to better characterize how ecological mechanisms act locally on the existence of inter-specific interactions. Here we argue that the current conceptualization of species interaction networks is ill-suited for this task...
Keywords: Ecology
Downloads: 12
[texts]Misuse of the null hypothesis in data reporting and interpretation : report - King, D. E. C
"PIBS2201"
Keywords: Ecology
Downloads: 342
[texts]The impacts of historical barriers on floristic patterns of plant groups with different dispersal abilities in the Ryukyu Archipelago, Japan - Koh Nakamura
The effects of historical barriers in biogeographical patterns are expected to persist differently depending on dispersal abilities of organisms. We tested two hypotheses that plant groups with different dispersal abilities display different floristic patterns, and that historical barriers can explain floristic differentiation patterns in plants with low dispersal ability but not in plants with higher dispersal ability, in the seed plant flora of the Ryukyu Archipelago...
Keywords: Ecology
Downloads: 8
[texts]lin xue gai lun (Volume 2) - cai yi chun wu bao qun (yi)

Keywords: ecology
Downloads: 164
[texts]lin xue gai lun (Volume 3) - cai yi chun wu bao qun (yi)

Keywords: ecology
Downloads: 188
[texts]A Component land classification for the United States : status report - Driscoll, Richard S., 1928-
Bibliography: p. 17-19
Keywords: Ecology
Downloads: 151
[texts]The dark side of theoretical ecology - Lev V. Kalmykov
Good science must be clearly transparent in its theories, models and experiments. Earlier David Tilman drew attention to the fact that ecologists investigate interspecific competition phenomenologically, rather than mechanistically. To create a mechanistic model of a complex dynamic system we need to logically describe interactions of its subsystems which lead to emergence of new properties on the macro-level...
Keywords: Ecology
Downloads: 8
[texts]lv hua huang shan bao chi shui tu - zhong hua ren min gong he guo lin ye bu zao lin ju ji shu chu

Keywords: ecology
Downloads: 198
[texts]liao ning sheng zhang gu tai gu sha zao lin shi yan - zhong guo ke xue yuan lin ye tu rang yan jiu suo

Keywords: ecology
Downloads: 148
[texts]The web of life : a first book of ecology - Storer, John H. (John Humphries), b. 1888
"A Mentor book."
Keywords: Ecology
Downloads: 182
[texts]Estimating seed bank accumulation and dynamics in three obligate-seeder Proteaceae species - Meaghan E. Jenkins
The seed bank dynamics of the three co-occurring obligate-seeder (i.e. fire-sensitive) Proteaceae species, Banksia ericifolia, Banksia marginata and Petrophile pulchella, were examined at sites of varying time since the most recent fire (i.e. plant age) in the Sydney region. Significant variation among species was found in the number of cones produced, the position of the cones within the canopy, the percentage of barren cones produced (Banksia species only), the number of follicles/bracts produ...
Keywords: Ecology
Downloads: 6
[texts]nei meng xi lin guo lei meng cao chang gai kuang ji qi zhu yao mu cao de jie shao 内蒙锡林郭勒盟草场概况及其主要牧草的介绍 - wang dong 王栋

Keywords: ecology
Downloads: 171
[texts]Data-intensive multidimensional modeling of forest dynamics - Jean F Lienard
Forest dynamics are highly dimensional phenomena that are poorly understood theoretically. Modeling these dynamics is data-intensive and requires repeated measurements taken with a consistent methodology. Forest inventory datasets offer unprecedented opportunities to model these dynamics, but they are analytically challenging due to high dimensionality and sampling irregularities across years. We develop a methodology for predicting forest stand dynamics using such datasets...
Keywords: Ecology
Downloads: 9
[texts]Mapping migration in a songbird using high-resolution genetic markers - Kristen C Ruegg
Neotropical migratory birds are declining across the Western Hemisphere, but conservation efforts have been hampered by the inability to assess where migrants are most limited–the breeding grounds, migratory stopover sites, or wintering areas. A major challenge has been the lack of an efficient, reliable, and broadly applicable method for connecting populations across the annual cycle. Here we show how high-resolution genetic markers can be used to identify populations of a migratory bird, the...
Keywords: Ecology
Downloads: 18
[texts]Social, spatial and temporal segregation in an ant society - Lauren E Quevillon
abstract forthcoming.
Keywords: Ecology
Downloads: 12
[texts]kun chong tu pu (Volume 2) - wang yun wu zhou jian ren

Keywords: ecology
Downloads: 173
[texts]mian hua zai pei xue - shi zhen

Keywords: ecology
Downloads: 204
[texts]mangal - making complex ecological network analysis simpler - Timothée E Poisot
The study of ecological networks is severely limited by (i) the difficulty to access data, (ii) the lack of a standardized way to link meta-data with interactions, and (iii) the disparity of formats in which ecological networks themselves are represented. To overcome these limitations, we conceived a data specification for ecological networks. We implemented a database respecting this standard, and released a R package ( \`rmangal\`) allowing users to programmatically access, curate, and deposit...
Keywords: Ecology
Downloads: 12
[texts]A solution to the biodiversity paradox by logical deterministic cellular automata - Lev V. Kalmykov
The paradox of biological diversity is the key problem of theoretical ecology. The paradox consists in the contradiction between the competitive exclusion principle and the observed biodiversity. This principle was formulated incorrectly because of limitations of the traditional black-box models of interspecific competition. The principle is very important as the basis for understanding evolutionary processes...
Keywords: Ecology
Downloads: 7
[texts]lin xue gai lun (Volume 5) - zhang hua ling wu bao qun (yi)

Keywords: ecology
Downloads: 230
[texts]Pushed beyond the brink: Allee effects, environmental stochasticity, and extinction - Gregory Roth
To understand the interplay between environmental stochasticity and Allee effects, we analyze persistence, asymptotic extinction, and conditional persistence for stochastic difference equations. Our analysis reveals that persistence requires that the geometric mean of fitness at low densities is greater than one. When this geometric mean is less than one, asymptotic extinction occurs with high probability for low initial population densities...
Keywords: Ecology
Downloads: 7
[texts]Allee effects are necessary to explain the emergence of ‘elastic’ ranges - Alexander Kubisch
In times of severe environmental changes and resulting shifts in the geographical distribution of animal and plant species it is crucial to unravel the mechanisms responsible for the dynamics of species’ ranges. Without such a mechanistic understanding reliable projections of future species distributions are difficult to derive. Species ranges may be highly dynamic and subject to ‘elastic’ behavior, i.e...
Keywords: Ecology
Downloads: 13
[texts]jiang xi zhong yao (Volume 2) - jiang xi sheng zhong yi yao yan jiu suo

Keywords: ecology
Downloads: 220
[texts]Spatial variation in water loss predicts terrestrial salamander distribution and population dynamics - William Peterman
Many patterns observed in ecology, such as species richness, life history variation, habitat use, and distribution have physiological underpinnings For many ectothermic organisms temperature relations shape these patterns, but for terrestrial amphibians, water balance may supersede temperature as the most critical physiologically-limiting factor. Many amphibian species have little resistance to water loss, which restricts them to moist microhabitats and may significantly affect foraging, dispers...
Keywords: Ecology
Downloads: 11
[texts]Meteorological conditions influence short-term survival and dispersal in a reinforced long-lived bird population. - Loïc A Hardouin
1. A high immediate mortality rate of released animals is an important cause of translocation failure (release cost). Post-release dispersal (i.e. the movements from the release site to the first breeding site) has recently been identified as another source of local translocation failure. In spite of their potential effects on conservation program outcomes, little is known about the quantitative effects of these two sources of translocation failure and their interactions with environmental facto...
Keywords: Ecology
Downloads: 10
[texts]Response to climate change is related to species traits in the Lagomorpha - Katie Leach
Climate change during the last five decades has impacted on natural systems significantly and the rate of current climate change is of great concern among conservation biologists. Here, we assess the projected change in the bioclimatic envelopes of all 87 species in the mammalian order Lagomorpha under future climate using expertly validated species distribution models. Results suggest that climate change will impact more than two-thirds of Lagomorphs, with leporids (rabbits, hares and jackrabbi...
Keywords: Ecology
Downloads: 9
[texts]The determinants of alpine butterfly richness and composition vary according to the ecological traits of species - Vincent Sonnay
Predicting spatial patterns of species diversity and composition using suitable environmental predictors is an essential element in conservation planning. Although species have distinct relationships to environmental conditions, some similarities may exist among species that share functional characteristics or traits. We investigated the relationship between species richness, composition and abiotic and biotic environment in different groups of butterflies that share ecological characteristics...
Keywords: Ecology
Downloads: 15
[texts]Some plants don’t play games: An ideal free distribution explains the root production of plants that do not engage in a tragedy of the commons game. - Gordon McNickle
1. Game theoretic models that seek to predict the most competitive strategy plants use for competition in soil are clear; they generally predict that over-proliferation of roots is the only evolutionarily stable strategy. However, empirical studies are equally clear that not all plants employ this strategy of over-proliferation of roots. Here, our goal was to develop and test an alternative non-game theoretic model that can be used to develop alternative hypotheses for plants that do not appear ...
Keywords: Ecology
Downloads: 9
[texts]Spatial distribution and seasonal fluctuations of Drosophila on Santa Catalina Island with an emphasis on the repleta species group - Joyce Y Kao
Santa Catalina Island is a small island off the coast of southern California and for its modest size harbors several species of flies from the Drosophila genus. We performed an island-wide survey of Drosophila species to ascertain which species were endemic to the island and where they were most abundant. In doing so, we have assembled useful sampling information for researchers who wish to conduct field studies on Santa Catalina Island...
Keywords: Ecology
Downloads: 7
[texts]Assessing the Use of Antiviral Treatment to Control Influenza - Sarah C Kramer
Vaccines are the cornerstone of influenza control policy, but can suffer from several drawbacks. Seasonal influenza vaccines are prone to production problems and low efficacies, while pandemic vaccines are unlikely to be available in time to slow a rapidly spreading global outbreak. Antiviral therapy was found to be beneficial during the influenza A(H1N1)pdm09 pandemic even with limited use; however, antiviral use has decreased further since then...
Keywords: Ecology
Downloads: 8
[texts]Os cabotinos - Ruano, António. cn
Mode of access: Internet
Keywords: ecology
Downloads: 196
[texts]Burrow architectural types of the Atlantic ghost crab, Ocypode quadrata (Fabricius, 1787) (Brachyura: Ocypodidae), in Brazil - Willian T. A. F. Silva
A broad range of aspects from paleontology to physiology of the ghost crabs Ocypode quadrata have been studied worldwide. These crabs have been used as ecological indicators of the levels of anthropogenic impacts on sandy beaches. Our aim is to report the variety of burrow architecture types constructed by ghost crabs Ocypode quadrata on beaches of Maceió, Brazil. We found 20 types of burrows that differ in shape (number of axes, number of openings, orientation of blind end, number of branches)...
Keywords: Ecology
Downloads: 11
[texts]shan xi sheng shui tu bao chi jing yan jie shao 陕西省水土保持经验介绍 (Volume 2) - shan xi sheng shui li ting 陕西省水利厅

Keywords: ecology
Downloads: 158
[texts]Black rhinoceros demography should be stage, not age, based. - Peter R Law
Biologically meaningful and standardized definitions of life stages are essential for demographic studies, especially for endangered and intensively managed species such as rhinoceros. Focusing on the black rhinoceros Diceros bicornis, we argue that standardized biological definitions of calf, subadult, and adult, rather than age classes, provide the appropriate basis for black rhinoceros demography...
Keywords: Ecology
Downloads: 14
[texts]mian hua ji qi zai pei - chen busheng yang huisheng

Keywords: ecology
Downloads: 275
[texts]Climate change triggers morphological and life-history evolution in response to predators - Edmund Hart
Although climate change is expected to reorganize entire communities, this restructuring might reflect either direct ecological or evolutionary responses to abiotic conditions or indirect effects mediated through altered species interactions. We tested the hypothesis that changes in trophic interaction strength due to altered predator abundance have a cascading evolutionary response in a prey species (Daphnia pulex)...
Keywords: Ecology
Downloads: 10
[texts]kun chong tu pu (Volume 1) - wang yun wu zhou jian ren

Keywords: ecology
Downloads: 155
[texts]On a solution of the biodiversity paradox and a competitive coexistence principle - Lev V. Kalmykov
The biodiversity paradox is the central problem in theoretical ecology. The paradox consists in the contradiction between the competitive exclusion principle and the observed biodiversity. This contradiction is the key subject of the long-standing and continuing biodiversity debates. The paradox impedes our insights into biodiversity conservation. Previously we proved that due to a soliton-like behaviour of population waves complete competitors can indefinitely coexist in one closed homogeneous ...
Keywords: Ecology
Downloads: 10
[texts]ResistanceGA: An R package for the optimization of resistance surfaces using genetic algorithms - William E Peterman
1. Understanding how landscape features affect functional connectivity among populations is a cornerstone of landscape genetic analyses. However, parameterization of resistance surfaces that best describe connectivity is largely a subjective process that explores a limited parameter space. 2. ResistanceGA is a new R package that utilizes a genetic algorithm to optimize resistance surfaces based on pairwise genetic distances and either CIRCUITSCAPE resistance distances or cost distances calculate...
Keywords: Ecology
Downloads: 22
[texts]Complex behavioral manipulation drives mismatch between host and parasite diversity - Fabricio Baccaro
Parasites and hosts are intimately associated such that changes in the diversity of one partner are thought to lead to changes in the other. We investigated this linked diversity hypothesis in a specialized ant-Ophiocordyceps system in three forests across 750 km in Central Amazonia. All species belonging to the fungal genus Ophiocordyceps associated with ants have evolved some degree of behavioral control to increase their own transmission, but the leaf-biting behavior is the most complex form ...
Keywords: Ecology
Downloads: 10
[texts]huang hai chao jian dai sheng tai xue yan jiu (Volume 1(2)) - gu li ya nuo wa

Keywords: ecology
Downloads: 185
[texts]Linking indices for biodiversity monitoring to extinction risk theory - Michael A. McCarthy
Biodiversity indices often combine data from different species when used in monitoring programs. Heuristic properties can suggest preferred indices, but we lack objective ways to discriminate between indices with similar heuristics. Biodiversity indices can be evaluated by determining how well they reflect management objectives that a monitoring program aims to support. For example, the Convention on Biological Diversity requires reporting about extinction rates, so simple indices that reflect e...
Keywords: Ecology
Downloads: 12
[texts]lin ye sheng chan jie ling biao - zhong hua ren min gong he guo lin ye bu zao lin si he zuo lin chu

Keywords: ecology
Downloads: 250
[texts]Extracting robust trends in species' distributions from unstructured opportunistic data: a comparison of methods - Nick JB Isaac
1. Policy-makers increasingly demand robust measures of biodiversity change over short time periods. Long-term monitoring schemes provide high-quality data, often on an annual basis, but are taxonomically and geographically restricted. By contrast, opportunistic biological records are relatively unstructured but vast in quantity. Recently, these data have been applied to increasingly elaborate science and policy questions, using a range of methods...
Keywords: Ecology
Downloads: 9
[texts]Particle size distribution and optimal capture of aqueous macrobial eDNA - Cameron R. Turner
1. Detecting aquatic macroorganisms with environmental DNA (eDNA) is a new survey method with broad applicability. However, the origin, state, and fate of aqueous macrobial eDNA - which collectively determine how well eDNA can serve as a proxy for directly observing organisms and how eDNA should be captured, purified, and assayed - are poorly understood. 2. The size of aquatic particles provides clues about their origin, state, and fate...
Keywords: Ecology
Downloads: 12
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